package old.apiday04;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class SortListDemo {
    public static void main(String[] args) {
        Random rand=new Random();
        List<Integer> list=new ArrayList<>();
        for (int i = 0; i <10 ; i++) {
            list.add(rand.nextInt(100));
        }
        System.out.println("list"+list);
        Collections.sort(list);//排序
        System.out.println(list);
        Collections.reverse(list);//反转
        System.out.println(list);

    }
}
